Holding in Company

Diploma PLC
18 April 2001



LETTER TO:  DIPLOMA PLC

17 APRIL 2001

Re: S.198 Companies Act 1985: as amended by The Disclosure of Interest in
    Shares (Amendment) Regulations 1993

In accordance with the Companies Act 1985, (as amended) I write to notify you
that Phillips & Drew Life Limited has an interest in 1,554,539 ord 5p shares
of the Company.  This represents 6.17% of the issued share capital of the
Company.

Below is a list of the Registered holders.

Phillips & Drew Life Limited is a subsidiary of UBS Asset Management Holding
(No.2) Limited which is also treated as having an interest in the above shares. 
We are authorised to make this aggregate disclosure on behalf of UBS Asset
Management Holding (No.2) Limited the registered address of which is:

                   Triton Court
                   14 Finsbury Square
                   London EC2A 1PD


LETTER FROM PHILLIPS & DREW 



                          Diploma PLC

            Total Issued Share Capital - 25,164,345

Name                                                   Quantity

PHILDREW NOMINEES LIMITED            A/C LF09            79,106
PHILDREW NOMINEES LIMITED            A/C LF20         1,475,433
                                                      ---------
                                                      1,554,539
                                                      ---------
                                                          6.17%